Andreas Hausladen releases new versions of the IDE Fix Pack at irregular intervals. Watch the release page. Currently it is at version 5.3: IDE Fix Pack 5.3 and for Delphi XE2 it indicates “IDE Fix Pack 5.3 for XE2+UP4+Hotfix1”.

While installing the Hotfix 1, you can get messages like these:

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Embarcadero RAD Studio XE2
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Error
Error applying patch to file C:\Program Files (x86)\Embarcadero\RAD Studio\9.0\lib\win64\release\IdSSLOpenSSLHeaders.dcu. It has probably been updated by other means, and can no longer be modified by this patch. For more information contact your patch vendor.
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Abort Retry Ignore
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The reason is that the installer thought it had enough disk space, but the dynamic swap file growth of Windows systems decreased the disk space after the initialler estimate.